Sensitivity of the heterodyne gravitational wave detector.

Details Sensitivity of the heterodyne gravitational wave detector. Sensitivity of the heterodyne gravitational wave detector.

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gregr...7..847b&link_type=abstract

General Relativity and Gravitation, Volume 7, Issue 11, pp.847-855

Astronomy and Astrophysics

Astrophysics

Scientific paper

In order to explore the actual astrophysical possibilities of the heterodyne gravitational wave detector we study its main limitation, due to the motion around the Earth and the Sun. This places an intrinsic limit to the time during which the detector stays tuned to the source and prevents us from taking full advantage of the very large quality factor of sources like pulsars. We study the ratio of signal to thermal noise and find, for a wave of given amplitude, that it is proportional toω 4/3 Q 1/2, whereω is the frequency of the source andQ the mechanical quality factor. Consideration of possible astrophysical sources shows the difficulty of detection and points to the need for a tunable heterodyne system.

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